超细粉末烧结体热轧件相对密度的测定同样选用杭州金迈仪器有限公司生产的DE-120M型高精度密度计，基于排水法原理测量烧结体及轧坯的密度，并使用相关公式计算出相对密度。其维氏硬度的测定选用上海联尔试验设备有限公司HVS-10型显微硬度计测试烧结体及轧坯的显微硬度。测量前保证试样表面平整光滑，试验载荷设置为0.3kg(2.94N)，保压时间为15s，每个试样正反面各测不同位置随机5个点，实验结果取其算术平均值。

The relative density of hot-rolled parts of ultra-fine powder sintered body is also determined by using the DE-120M high-precision densitometer produced by Hangzhou Jinmai Instrument Co., Ltd. Based on the principle of drainage method to measure the density of sintered body and rolling stock, and use relevant formulas to calculate Relative density. The measurement of its Vickers hardness uses Shanghai Lianer Testing Equipment Co., Ltd. HVS-10 type microhardness tester to test the microhardness of the sintered body and the rolled billet. Before measurement, ensure that the surface of the sample is flat and smooth, the test load is set to 0.3kg (2.94N), the pressure holding time is 15s, and the front and back sides of each sample are measured at 5 random points at different positions. The experimental result is the arithmetic average.